Superheater for locomotive, marine, and other tubular boilers.



LN. D.-HEENAN.

MARlNE, AND OTHER TUBUL'AR BOILERS. vAPPLICATION FILED MAYiz. |916;

'TE srArEs 'PAT fr OEE .ToHNNELsoN DUNDAs HEENAN, or .CHAPEL WALxs, MANcHEsTEE, ENGLAND, AssrcNon To HEENAN a FHoUnE LIMrrEp, o E MANcHEsTER, ENGLAND.

SUPERHEATERFOR LOCOIVIOTIVE, MARINE, AND OTHER '.lU'IB'LARBOILI'ERS.y

' Specification of Letters Patent.

' Patented Mayas, 1917.

'Application filed May 12, 1916. Serial No. 97,160.

l serted in the ire tubes and connected to steam headers in the smoke box.

'Ihe invention consists essentially 1n the particular construction and disposition comprising an independent connection box separately tted to the end of each superheater element and independent tubes connecting the boxes to the steam headers, or in series to one another. j

The invention will be fully described with reference to the accompanying drawings.

Figure 1. is a front elevation of a battery of steam superheaters with some of the inlet and outlet steam pipes broken away.

Fig. 2. is a longitudinal section through steam headers and three of the boiler tubes showing the disposition of the connections of four elements of the superheaters.

Fig. 3. is a longitudinal sectional elevation of one element of the superheater.

Fig. 4. is a transverse section through boiler tube showing superheater element in position.

Fig. 5. is a transverse section of connecting box.

The superheater tubes A Aiare of ordi` nary construction or they may have ribs or gills a as in the specification of U. S. Pat-V ent No. 1070115, and are fitted into the boiler tubes B. And the inlet and outlet steam headers C C are preferably placed transversely across the end of the boiler.

Each tube A is fitted at its outer end to a separate and independent connection box D through which the steam enters and leaves the superheater tubes AA A.

The connection box D is constructed with a through passage longitudinally and an interior annular chamber Z into which an inlet port or passage d enters at right angles and is fitted with two loose flanges E E by which the inlet steam pipes e and outlet pipes e or e2 are attached to each connection box.

The external superhe'ater tube A is screwed Vor expanded into the rear side of its connection box D connecting with or opening into the Vcentral or annular chamber dV and the internal or return superheater tube A yis'passed through the connection box and is screwed or expanded into the front end of the through passage therein thereby joining the twov tubes A A` into a single superheater element. The outer ends of the two tubes A and A are thus connected, the tube A with the inlet steam pipe e through the annular steam chamber d and passage d and the tube A with the outlet steam pipe e or e2 the opening' into which is coincident with the through passage of the connection box. y

The joints for the inlet and outlet steam pipes e, e or e2 are formed by swa'ging or forming a flange ea around the end of each pipe and securing the flange'to the face of the connection boxD by a loose flange or plate E or E placed over the tube and bolted to the connection box with or without a gasket or other packing.

Each inlet steam pipe @may lead direct from the inlet steam header C to a connection box D and each outlet steam pipe e may be connected direct to the outlet steam header C. y

I at present prefer however to couple .two or more connection boxes D andelements ofthe steam superheater together in series they being shown coupledftogether in pairs with the outlet steam pipe e2 of the first forming the inlet steam Ypipe of the second the first one being connected with the inlet steam header C by the inlet steam pipe c and the second one being connected with the outlet steam header C by the outlet steam pipe e. Any desired number. of the elements may thus be connected in series.

What I claim as my invention and desire to protect by Letters Patent is:-

1. In a superheater of the class specified, the combination with boiler tubes, ofv superheater tubes extending into the boiler tubes Y and of less diameter than the latter, and an independent connection box for each superhe'ater tube, each connection box beingl con- 105 to the superheaterftube and also. provided with an outlet'port, inlet and outlet lpipes having terminals fitted over the inlet and outlet ports, and Vsecuring devices y loosely surrounding and engaging the terminals of the inlet Vand. outlet pipesand .connected to the box.

2.V In a superheateroi the class specified, the Combination With boiler tubes each having' a superheating tube therein, oi a sepa-V rate and independent connection box for each superheating element, said box being Y provided lwith inlet and outlet ports at angles to each other, inlet and outlet pipes having inner flanged ends placed against the connection box over the inlet and out- VVlet ports, and plates loosely surrounding the inlet and outlet pipes and engaging the flanges of the said pipes, the said plates be- Y Copies of this patent may be obtained for the combination With boiler tubes, su'per-VV Y heater tubes mounted therein and inlet and outlet steam headers; of separate and indeheater tubes, each tubebeing Connected to Vpendent connection boxes forfthe super- Y a box, the connection boxes having passages therethrough and inlet and outlet ports opening into dilferentiportions of these passages, and independent inlet and set my hand inpresenoe of tWo subsoribingV Witnesses.

JOHN NELSON DUNDAS HERNAN. Y Y

Witnesses: l Y

N. BRoWNING-PATERSON, Gr. KLINGENSTEIN.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. Y 

